ILEARN CHECKPOINT 1 MATH

Addition & Subtraction (to 1,000)

100

Add: 347 + 152. Show regrouping steps

347 + 152 = 499

200

 Subtract: 802 − 279. Show regrouping steps.

802 − 279 = 523

300

Find the sum and show work: 465 + 388.

• 465 + 388 = 853

400

Solve: 1,000 − 647. (Hint: use regrouping across zeros.)

• 1,000 − 647 = 353

500

A class has 589 pencils. The teacher buys 268 more. Later 374 pencils are given to another class. How many pencils remain? Show addition and subtraction steps with regrouping.

589 + 268 = 857; 857−374=483 

Money

100

Write the value: three quarters, two dimes, and one penny. (Write as $ and cents.)

3 quarters + 2 dimes + 1 penny = 0.75+0.20+0.01=0.96 ; $0.96 or 96 cents

200

Sam has $4.35 and spends $1.70. How much does he have left?

$4.35 − $1.70 = $2.65 

300

Find the total: $2.45 + $3.60 + $0.95.

$2.45 + $3.60 + $0.95 = $7.00

400

Maria wants to buy a toy for $7.89. She has two $5 bills and three quarters. Does she have enough? If so, how much will remain? If not, how much more does she need?

$5 + $5 + $0.75 = $10.75

$10.75 − $7.89 = $2.862 (enough; $2.86 left)

500

A group of 4 students share the cost of a $20.00 field trip ticket equally. How much does each student pay?  

$5 + $5 + $5 +5 = $20

$5.00

Rounding (nearest 10 & 100)

100

Round 243 to the nearest 10.

240

200

 Round 247 to the nearest 100.

200

300

Round 586 to the nearest 10 and to the nearest 100.

10 = 590 

100 = 600

400

A number rounds to 500 when rounded to the nearest 100 and to 480 when rounded to the nearest 10. Give one possible original number and explain.

• Example number: 485 (nearest 100 → 500; nearest 10 → 490) — adjust to satisfy both: 475 (nearest 100 → 500? No). Correct example: 475 rounds to 500? 475 → nearest 100 = 500 and to nearest 10 = 480 (so 475 works).

500

Explain why 345 rounded to the nearest 10 is 350, but 345 rounded to the nearest 100 is 300. Use place-value language.

• 345 → to nearest 10: 350350 because tens place 4 and ones 5 rounds up; to nearest 100: 300300 because hundreds digit 3 and tens 4 (<5) rounds down.

Place Value

100

What is the value of the digit 7 in 372?

70

200

Write 504 in expanded form.

500 + 4 = 504

300

What number is 100 more than 689? Show place-value thinking.

• 689 + 100 = 789

400

 In the number 8,134 (four-digit), what is the value of the digit 1? (Then write 8,134 as a sum of place-value amounts.)

8,134: value of 1 = 100; 8,134 = 8,000+100+30+4

500

Create a three-digit number where the hundreds digit is 4 times the tens digit and the sum of digits is 12. What is the number? Show place-value reasoning.

hundreds digit = 4×tens digit, digits sum 12. Try tens = 2 → hundreds = 8; then hundreds+ tens + ones = 8 + 2 + 2 = 12 → ones = 2 → number = 822.

Word Problems

100

 Lily has 128 stickers. She gives 54 to a friend. How many stickers does Lily have left?

128 − 54 = 74

200

Mark reads 86 pages on Monday and 157 pages on Tuesday. How many pages did he read in all?

86 + 157 = 243

300

 A baker made 423 muffins. He accidently burnt 124 of the muffins and had to throw them away. He made 189 more muffins. How many muffins does he have now?

423 - 124 = 299

299 + 189 = 488

400

A store sold 745 apples in a week. If it sold 213 apples on Monday and 189 on Tuesday, how many apples were sold the rest of the week?

745 − (213 + 189) = 745 − 402 = 343

 

500

Tina had $250. She spent $87 on a backpack and then earned $56 doing chores. She then bought school supplies for $92. How much money does she have now?

$250 − 87 = 163; 163+56=219; 219−92=127

Tina has $127 left